Grill cleaning sponge



FIG. 1. is a perspective view of a grill cleaning sponge showing my new design;

FIG. 2 is a first end view thereof;

FIG. 3. is a first side view thereof;

FIG. 4. is a top plan view thereof; and,

FIG. 5. is a second side elevational as seen from the side that is seen at 180 degrees from that of FIG. 3. 

The ornamental design for a grill cleaning sponge, as shown and described. 